/ Dictionary / Index C coauthor: Meaning and Definition of Find definitions for: co•au•thor Pronunciation: (kō-ô'thur, kō'ô"-), [key] — n. one of two or more joint authors. —v.t. to write in joint authorship. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: coauthor (Thesaurus) coat tree coax Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language